This story is exactly the same one I've told before. Artists do not want unauthorised recordings to be shared.
If this IS an IEM capture, it is 99.995% likely it doesn't reflect the sound the audience hears. IEMs and monitoring are a very specific thing.
My monitors are extremely unbalanced and sound nothing like a record, or what I hope the audience is experiencing.
Also, again, a lot 'entitled' chatter on that thread - if bands don't want illicit recordings to be shared, they should release unedited versions of the live show?
First, it's not possible logistically. Second, a live show is a LIVE show. It isn't a record.
For anyone who started playing live before the internet and iPhones, it was a communion between artist and audience. Nowadays you are playing to a majority of people holding iPhones in the air, concentrating more on their exposure, the camera angle, than they are on just enjoying the show.
Some artists ask people not to record the show on an iPhone and for the most part this is respected.
Which is great!